Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/wtf/DoublyLinkedList.h

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #ifndef DoublyLinkedList_h
 #define DoublyLinkedList_h
 
 namespace WTF {
 
 // This class allows nodes to share code without dictating data member layout.
 template<typename T> class DoublyLinkedListNode {
 public:
     DoublyLinkedListNode();
-    
+
     void setPrev(T*);
     void setNext(T*);
-    
+
     T* prev() const;
     T* next() const;
 };
 
 template<typename T> inline DoublyLinkedListNode<T>::DoublyLinkedListNode()
 {
     setPrev(0);
     setNext(0);
 }
 
@@ skipping 13 matching lines @@
 }
 
 template<typename T> inline T* DoublyLinkedListNode<T>::next() const
 {
     return static_cast<const T*>(this)->m_next;
 }
 
 template<typename T> class DoublyLinkedList {
 public:
     DoublyLinkedList();
-    
+
     bool isEmpty() const;
     size_t size() const; // This is O(n).
     void clear();
 
     T* head() const;
     T* removeHead();
 
     T* tail() const;
 
     void push(T*);
@@ skipping 102 matching lines @@
         remove(node);
     return node;
 }
 
 } // namespace WTF
 
 using WTF::DoublyLinkedListNode;
 using WTF::DoublyLinkedList;
 
 #endif